I've seen this happen quite a few times. I "turn on the traffic" for a new sponsor, or an old sponsor that I didn't send a lot of traffic to before. At first the signups and hitting right away. And then they stop.
Most of the time they return after a few days. I've had a couple that never returned lol
So are you guys flagging new, unexpected sellers? Or what? Can you turn off the shave a little sooner?